Water until you see runoff from the bottom of the pot (be careful with smart pots as if you “flood” the pot, water will just run down the sides and off without ever saturating any soil). For reference, I give my plant a gallon of water and she’s in a 3 gallon smart pot Don’t water again until the soil is totally dry two knuckles deep. The whole smart pot should feel pretty dry on the outside. Plants don’t like it if you water too frequently.

More means more weed in less time. It doesn't mean better or worse. If you want a lot of weed in a shorter amount of time, do 9 plants. If you want a smaller amount of weed in the same amount of time, or if you want to veg a lot longer for the same yield, then do 4 plants. Totally up to you and how you want to grow.

If you're a new grower, it's recommended not to defoliate. Defoliation can certainly work, and is typically used to cut off giant fan leaves that are blocking light from areas where flower would grow. Exposing more light to new growth during flower will increase yield. However, new growers often get carried away, and their heavily defoliated plant no longer has enough fan leaves to grow well, and yield ends up being worse.

Don't cut sugar leaves until after harvest; they have trichomes on them that need to develop.

For your first time, I would recommend simply LST or Screen of Green to pull down fan leaves and expose new growth. That way the fan leaves are still around to get any extra light, but the majority of the light goes to the parts that need it most.

You can actually get the exact dosage you want! If you can get the THC content of the shatter, then you can find out exactly how many mg of THC you’re working with. For example, if your shatter is 83% THC, one gram would be 0.83g of THC, or 830mg. If I don’t have the THC content, I estimate 80%.

I usually just use a g to make a batch of cookies. 800mg in 2 dozen cookies would be 800/24=33mg per cookie.

I make edibles with shatter. Just heat up the shatter at 225ºF for about 20 minutes, and then melt it into your butter/coconut oil/tincture. Smell and taste are very subtle. When you open the oven after the 20 minutes, it smells like a dab and that's about it.

The dehumidifier would help with drying. AFAIK, for curing, you just need to dry the weed to about 65% RH, and then let it sit in jars in a cool, dark place for about a month (ensuring that it stays at 65% RH. Keep checking to make sure you don’t grow mold), opening the jars for a few minutes every day or two to replace the air in there.

Your comment makes zero sense. tar is not dangerous or a bad idea. dpkg, which is used by Cydia, uses tar files (and note that for any reasonable package installer, you don't just rm -rf .. Packages install files in specific places on your device. That's why dpkg keeps a list of what gets installed and then removes them specifically.

I'm assuming whatever package management system Installer is using, whether its dpkg itself or some package manager that works the same as dpkg but the Installer guys made themselves, will also keep track and not just run rm -rf .. And if you run that command as root at /, then you're probably not a developer.